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Green Diamonds AFS 100 Pre-mulled Foundry Sand - 50lbs

Green Diamond foundry sand has been processed by melting and then granulated by quenching in water. It has the same main advantages that the natural Olivine has, which are no free silica and a low thermal expansion, which minimizes, or eliminates expansion defects, and reacts basic, rather than acidic like silica sand.

It is a much tougher grain that breaks down as much as 60% less producing fewer fines and dust, and reducing the need for new sand additions to offset the fines buildup.

It chills the metal less rapidly, allowing the pouring temperature to be reduced by 30-50F, giving a better finish and being less abusive to the sand, again reducing the need for new sand additions.

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